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Optical constants of Tb3Ga5O12 (Terbium gallium garnet, TGG)
Franta et al. 2025: n,k 0.120–400 µm

Wavelength: µm
 (0.119997–400.009)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Comments

Single-crystal Tb3Ga5O12; Heterogenous data processing combining ellipsometric and spectrophotometric measurements with refractive index data (Schlarb et al. 1994); 5, 3, and 0.5 mm thick plates; Room temperature.

References

D. Franta, M.-G. Mureșan, P. Ondračka, B. Hroncová, F. Vižďa. Wide spectral range optical characterization of terbium gallium garnet (TGG) single crystal by universal dispersion model, Opt. Laser Technol. 181, 111916 (2025) (Numerical data kindly provided by Daniel Franta)

Data

[CSV - comma separated]   [TXT - tab separated]   [Full database record]

INFO

Terbium gallium garnet, Tb3Ga5O12 (TGG)

Terbium gallium garnet (Tb3Ga5O12, TGG) is a magneto-optical crystal that exhibits excellent transparency in the visible and near-infrared regions. Its high Verdet constant makes it a prime material for use in Faraday rotators and optical isolators, key components in lasers and other optical systems that require the prevention of back-reflected light. TGG is known for its low absorption loss and high thermal conductivity, making it ideal for high-power laser applications. These properties, combined with its mechanical stability, ensure its performance in demanding environments such as laser systems used in industrial, medical, and research applications.

Other names

  • Terbium gallate garnet
  • Magneto-optical garnet

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